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Download Watch the episode titled “The Milky Way” from the series “The
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Name: Pd. Date: The Universe – The Milky Way Watch the episode titled “The Milky Way” from the series “The Universe” and completely answer the questions below. # *1 Question What does the Greek word ‘galacos’ mean? 2 5 When we look at the Milky Way, what is it that we are actually seeing? To what does the astronomer, Michelle Thaller, compare the Milky Way? How long does it take Earth to move around the galaxy? About how many galaxies reside in our Local Group? 6 How do elliptical galaxies get so large? 7 Why can’t black holes be seen directly? *8 11 What technology has allowed astronomers to ‘see’ past dust clouds in our galaxy? Name two of the four wave types that help astronomers see distant galaxies. Why is it important to use different wave types when observing the galaxy? How many main spiral arms does the Milky Way have? 12 Where do we live? 13 Do stars stay within the same arm/spur or do they move among different arms/spurs? Why is space dark? 3 4 9 10 *14 15 16 Besides diffuse or emission nebulae, name the two other types of nebulae found in our galaxy. What type of nebula is formed when stars die? 17 What makes the star, Mira A, so spectacular? 18 Why was this discovery important? *19 24 What type of waves allowed us to see the center of our galaxy? What do astronomers think came first, the galaxy or the black hole? Besides being sucked into the black hole, what else is happening at the edges of a black hole? Once formed at the edge of a black hole, what is likely to happen to that star? About how many times has our solar system been orbited around the Milky Way? Where is our galaxy headed? 25 What will happen when these galaxies collide? 26 When will star formation stop? 20 21 *22 23 Answer